625529449 has 4 divisors (see below), whose sum is σ = 647099460. Its totient is φ = 603959440.

The previous prime is 625529447. The next prime is 625529491. The reversal of 625529449 is 944925526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944925526 = 2 ⋅472462763.

It can be written as a sum of positive squares in 2 ways, for example, as 413390224 + 212139225 = 20332^2 + 14565^2 .

It is a cyclic number.

It is not a de Polignac number, because 625529449 - 2¹ = 625529447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625529399 and 625529408.

It is not an unprimeable number, because it can be changed into a prime (625529447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10784962 + ... + 10785019.

It is an arithmetic number, because the mean of its divisors is an integer number (161774865).

Almost surely, 2^625529449 is an apocalyptic number.

It is an amenable number.

625529449 is a deficient number, since it is larger than the sum of its proper divisors (21570011).

625529449 is a wasteful number, since it uses less digits than its factorization.

625529449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21570010.

The product of its digits is 777600, while the sum is 46.

The square root of 625529449 is about 25010.5867384194. The cubic root of 625529449 is about 855.2293305465.

The spelling of 625529449 in words is "six hundred twenty-five million, five hundred twenty-nine thousand, four hundred forty-nine".